Merge 0.9->trunk

2 files changed, 561 insertions, 643 deletions

diff --git a/plugins/mod_admin_adhoc.lua b/plugins/mod_admin_adhoc.lua
index ff672fc9..31c4bde4 100644
--- a/plugins/mod_admin_adhoc.lua
+++ b/plugins/mod_admin_adhoc.lua
@@ -10,6 +10,8 @@ local prosody = _G.prosody;
 local hosts = prosody.hosts;
 local t_concat = table.concat;
 
+local module_host = module:get_host();
+
 local keys = require "util.iterators".keys;
 local usermanager_user_exists = require "core.usermanager".user_exists;
 local usermanager_create_user = require "core.usermanager".create_user;
@@ -25,6 +27,8 @@ local dataforms_new = require "util.dataforms".new;
 local array = require "util.array";
 local modulemanager = require "modulemanager";
 local core_post_stanza = prosody.core_post_stanza;
+local adhoc_simple = require "util.adhoc".new_simple_form;
+local adhoc_initial = require "util.adhoc".new_initial_data_form;
 
 module:depends("adhoc");
 local adhoc_new = module:require "adhoc".new;
@@ -37,82 +41,69 @@ local function generate_error_message(errors)
 	return { status = "completed", error = { message = t_concat(errmsg, "\n") } };
 end
 
-function add_user_command_handler(self, data, state)
-	local add_user_layout = dataforms_new{
-		title = "Adding a User";
-		instructions = "Fill out this form to add a user.";
+-- Adding a new user
+local add_user_layout = dataforms_new{
+	title = "Adding a User";
+	instructions = "Fill out this form to add a user.";
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "accountjid", type = "jid-single", required = true, label = "The Jabber ID for the account to be added" };
-		{ name = "password", type = "text-private", label = "The password for this account" };
-		{ name = "password-verify", type = "text-private", label = "Retype password" };
-	};
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "accountjid", type = "jid-single", required = true, label = "The Jabber ID for the account to be added" };
+	{ name = "password", type = "text-private", label = "The password for this account" };
+	{ name = "password-verify", type = "text-private", label = "Retype password" };
+};
 
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-		local fields, err = add_user_layout:data(data.form);
-		if err then
-			return generate_error_message(err);
-		end
-		local username, host, resource = jid.split(fields.accountjid);
-		if data.to ~= host then
-			return { status = "completed", error = { message = "Trying to add a user on " .. host .. " but command was sent to " .. data.to}};
-		end
-		if (fields["password"] == fields["password-verify"]) and username and host then
-			if usermanager_user_exists(username, host) then
-				return { status = "completed", error = { message = "Account already exists" } };
+local add_user_command_handler = adhoc_simple(add_user_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
+	end
+	local username, host, resource = jid.split(fields.accountjid);
+	if module_host ~= host then
+		return { status = "completed", error = { message = "Trying to add a user on " .. host .. " but command was sent to " .. module_host}};
+	end
+	if (fields["password"] == fields["password-verify"]) and username and host then
+		if usermanager_user_exists(username, host) then
+			return { status = "completed", error = { message = "Account already exists" } };
+		else
+			if usermanager_create_user(username, fields.password, host) then
+				module:log("info", "Created new account %s@%s", username, host);
+				return { status = "completed", info = "Account successfully created" };
 			else
-				if usermanager_create_user(username, fields.password, host) then
-					module:log("info", "Created new account %s@%s", username, host);
-					return { status = "completed", info = "Account successfully created" };
-				else
-					return { status = "completed", error = { message = "Failed to write data to disk" } };
-				end
+				return { status = "completed", error = { message = "Failed to write data to disk" } };
 			end
-		else
-			module:log("debug", "Invalid data, password mismatch or empty username while creating account for %s", fields.accountjid or "<nil>");
-			return { status = "completed", error = { message = "Invalid data.\nPassword mismatch, or empty username" } };
 		end
 	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = add_user_layout }, "executing";
+		module:log("debug", "Invalid data, password mismatch or empty username while creating account for %s", fields.accountjid or "<nil>");
+		return { status = "completed", error = { message = "Invalid data.\nPassword mismatch, or empty username" } };
 	end
-end
+end);
 
-function change_user_password_command_handler(self, data, state)
-	local change_user_password_layout = dataforms_new{
-		title = "Changing a User Password";
-		instructions = "Fill out this form to change a user's password.";
+-- Changing a user's password
+local change_user_password_layout = dataforms_new{
+	title = "Changing a User Password";
+	instructions = "Fill out this form to change a user's password.";
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "accountjid", type = "jid-single", required = true, label = "The Jabber ID for this account" };
-		{ name = "password", type = "text-private", required = true, label = "The password for this account" };
-	};
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "accountjid", type = "jid-single", required = true, label = "The Jabber ID for this account" };
+	{ name = "password", type = "text-private", required = true, label = "The password for this account" };
+};
 
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-		local fields, err = change_user_password_layout:data(data.form);
-		if err then
-			return generate_error_message(err);
-		end
-		local username, host, resource = jid.split(fields.accountjid);
-		if data.to ~= host then
-			return { status = "completed", error = { message = "Trying to change the password of a user on " .. host .. " but command was sent to " .. data.to}};
-		end
-		if usermanager_user_exists(username, host) and usermanager_set_password(username, fields.password, host) then
-			return { status = "completed", info = "Password successfully changed" };
-		else
-			return { status = "completed", error = { message = "User does not exist" } };
-		end
+local change_user_password_command_handler = adhoc_simple(change_user_password_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
+	end
+	local username, host, resource = jid.split(fields.accountjid);
+	if module_host ~= host then
+		return { status = "completed", error = { message = "Trying to change the password of a user on " .. host .. " but command was sent to " .. module_host}};
+	end
+	if usermanager_user_exists(username, host) and usermanager_set_password(username, fields.password, host) then
+		return { status = "completed", info = "Password successfully changed" };
 	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = change_user_password_layout }, "executing";
+		return { status = "completed", error = { message = "User does not exist" } };
 	end
-end
+end);
 
-function config_reload_handler(self, data, state)
+-- Reloading the config
+local function config_reload_handler(self, data, state)
 	local ok, err = prosody.reload_config();
 	if ok then
 		return { status = "completed", info = "Configuration reloaded (modules may need to be reloaded for this to have an effect)" };
@@ -121,46 +112,39 @@ function config_reload_handler(self, data, state)
 	end
 end
 
+-- Deleting a user's account
+local delete_user_layout = dataforms_new{
+	title = "Deleting a User";
+	instructions = "Fill out this form to delete a user.";
 
-function delete_user_command_handler(self, data, state)
-	local delete_user_layout = dataforms_new{
-		title = "Deleting a User";
-		instructions = "Fill out this form to delete a user.";
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "accountjids", type = "jid-multi", label = "The Jabber ID(s) to delete" };
+};
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "accountjids", type = "jid-multi", label = "The Jabber ID(s) to delete" };
-	};
-
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-		local fields, err = delete_user_layout:data(data.form);
-		if err then
-			return generate_error_message(err);
-		end
-		local failed = {};
-		local succeeded = {};
-		for _, aJID in ipairs(fields.accountjids) do
-			local username, host, resource = jid.split(aJID);
-			if (host == data.to) and  usermanager_user_exists(username, host) and usermanager_delete_user(username, host) then
-				module:log("debug", "User %s has been deleted", aJID);
-				succeeded[#succeeded+1] = aJID;
-			else
-				module:log("debug", "Tried to delete non-existant user %s", aJID);
-				failed[#failed+1] = aJID;
-			end
+local delete_user_command_handler = adhoc_simple(delete_user_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
+	end
+	local failed = {};
+	local succeeded = {};
+	for _, aJID in ipairs(fields.accountjids) do
+		local username, host, resource = jid.split(aJID);
+		if (host == module_host) and  usermanager_user_exists(username, host) and usermanager_delete_user(username, host) then
+			module:log("debug", "User %s has been deleted", aJID);
+			succeeded[#succeeded+1] = aJID;
+		else
+			module:log("debug", "Tried to delete non-existant user %s", aJID);
+			failed[#failed+1] = aJID;
 		end
-		return {status = "completed", info = (#succeeded ~= 0 and
-				"The following accounts were successfully deleted:\n"..t_concat(succeeded, "\n").."\n" or "")..
-				(#failed ~= 0 and
-				"The following accounts could not be deleted:\n"..t_concat(failed, "\n") or "") };
-	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = delete_user_layout }, "executing";
 	end
-end
-
-function disconnect_user(match_jid)
+	return {status = "completed", info = (#succeeded ~= 0 and
+			"The following accounts were successfully deleted:\n"..t_concat(succeeded, "\n").."\n" or "")..
+			(#failed ~= 0 and
+			"The following accounts could not be deleted:\n"..t_concat(failed, "\n") or "") };
+end);
+
+-- Ending a user's session
+local function disconnect_user(match_jid)
 	local node, hostname, givenResource = jid.split(match_jid);
 	local host = hosts[hostname];
 	local sessions = host.sessions[node] and host.sessions[node].sessions;
@@ -173,447 +157,382 @@ function disconnect_user(match_jid)
 	return true;
 end
 
-function end_user_session_handler(self, data, state)
-	local end_user_session_layout = dataforms_new{
-		title = "Ending a User Session";
-		instructions = "Fill out this form to end a user's session.";
+local end_user_session_layout = dataforms_new{
+	title = "Ending a User Session";
+	instructions = "Fill out this form to end a user's session.";
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "accountjids", type = "jid-multi", label = "The Jabber ID(s) for which to end sessions" };
-	};
-
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "accountjids", type = "jid-multi", label = "The Jabber ID(s) for which to end sessions" };
+};
 
-		local fields, err = end_user_session_layout:data(data.form);
-		if err then
-			return generate_error_message(err);
-		end
-		local failed = {};
-		local succeeded = {};
-		for _, aJID in ipairs(fields.accountjids) do
-			local username, host, resource = jid.split(aJID);
-			if (host == data.to) and  usermanager_user_exists(username, host) and disconnect_user(aJID) then
-				succeeded[#succeeded+1] = aJID;
-			else
-				failed[#failed+1] = aJID;
-			end
-		end
-		return {status = "completed", info = (#succeeded ~= 0 and
-				"The following accounts were successfully disconnected:\n"..t_concat(succeeded, "\n").."\n" or "")..
-				(#failed ~= 0 and
-				"The following accounts could not be disconnected:\n"..t_concat(failed, "\n") or "") };
-	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = end_user_session_layout }, "executing";
+local end_user_session_handler = adhoc_simple(end_user_session_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
 	end
-end
-
-function get_user_password_handler(self, data, state)
-	local get_user_password_layout = dataforms_new{
-		title = "Getting User's Password";
-		instructions = "Fill out this form to get a user's password.";
-
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "accountjid", type = "jid-single", required = true, label = "The Jabber ID for which to retrieve the password" };
-	};
-
-	local get_user_password_result_layout = dataforms_new{
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "accountjid", type = "jid-single", label = "JID" };
-		{ name = "password", type = "text-single", label = "Password" };
-	};
-
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-		local fields, err = get_user_password_layout:data(data.form);
-		if err then
-			return generate_error_message(err);
-		end
-		local user, host, resource = jid.split(fields.accountjid);
-		local accountjid = "";
-		local password = "";
-		if host ~= data.to then
-			return { status = "completed", error = { message = "Tried to get password for a user on " .. host .. " but command was sent to " .. data.to } };
-		elseif usermanager_user_exists(user, host) then
-			accountjid = fields.accountjid;
-			password = usermanager_get_password(user, host);
+	local failed = {};
+	local succeeded = {};
+	for _, aJID in ipairs(fields.accountjids) do
+		local username, host, resource = jid.split(aJID);
+		if (host == module_host) and  usermanager_user_exists(username, host) and disconnect_user(aJID) then
+			succeeded[#succeeded+1] = aJID;
 		else
-			return { status = "completed", error = { message = "User does not exist" } };
+			failed[#failed+1] = aJID;
 		end
-		return { status = "completed", result = { layout = get_user_password_result_layout, values = {accountjid = accountjid, password = password} } };
+	end
+	return {status = "completed", info = (#succeeded ~= 0 and
+		"The following accounts were successfully disconnected:\n"..t_concat(succeeded, "\n").."\n" or "")..
+		(#failed ~= 0 and
+		"The following accounts could not be disconnected:\n"..t_concat(failed, "\n") or "") };
+end);
+
+-- Getting a user's password
+local get_user_password_layout = dataforms_new{
+	title = "Getting User's Password";
+	instructions = "Fill out this form to get a user's password.";
+
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "accountjid", type = "jid-single", required = true, label = "The Jabber ID for which to retrieve the password" };
+};
+
+local get_user_password_result_layout = dataforms_new{
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "accountjid", type = "jid-single", label = "JID" };
+	{ name = "password", type = "text-single", label = "Password" };
+};
+
+local get_user_password_handler = adhoc_simple(get_user_password_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
+	end
+	local user, host, resource = jid.split(fields.accountjid);
+	local accountjid = "";
+	local password = "";
+	if host ~= module_host then
+		return { status = "completed", error = { message = "Tried to get password for a user on " .. host .. " but command was sent to " .. module_host } };
+	elseif usermanager_user_exists(user, host) then
+		accountjid = fields.accountjid;
+		password = usermanager_get_password(user, host);
 	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = get_user_password_layout }, "executing";
+		return { status = "completed", error = { message = "User does not exist" } };
+	end
+	return { status = "completed", result = { layout = get_user_password_result_layout, values = {accountjid = accountjid, password = password} } };
+end);
+
+-- Getting a user's roster
+local get_user_roster_layout = dataforms_new{
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "accountjid", type = "jid-single", required = true, label = "The Jabber ID for which to retrieve the roster" };
+};
+
+local get_user_roster_result_layout = dataforms_new{
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "accountjid", type = "jid-single", label = "This is the roster for" };
+	{ name = "roster", type = "text-multi", label = "Roster XML" };
+};
+
+local get_user_roster_handler = adhoc_simple(get_user_roster_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
 	end
-end
-
-function get_user_roster_handler(self, data, state)
-	local get_user_roster_layout = dataforms_new{
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "accountjid", type = "jid-single", required = true, label = "The Jabber ID for which to retrieve the roster" };
-	};
-
-	local get_user_roster_result_layout = dataforms_new{
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "accountjid", type = "jid-single", label = "This is the roster for" };
-		{ name = "roster", type = "text-multi", label = "Roster XML" };
-	};
-
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-
-		local fields, err = get_user_roster_layout:data(data.form);
-
-		if err then
-			return generate_error_message(err);
-		end
 
-		local user, host, resource = jid.split(fields.accountjid);
-		if host ~= data.to then
-			return { status = "completed", error = { message = "Tried to get roster for a user on " .. host .. " but command was sent to " .. data.to } };
-		elseif not usermanager_user_exists(user, host) then
-			return { status = "completed", error = { message = "User does not exist" } };
-		end
-		local roster = rm_load_roster(user, host);
-
-		local query = st.stanza("query", { xmlns = "jabber:iq:roster" });
-		for jid in pairs(roster) do
-			if jid ~= "pending" and jid then
-				query:tag("item", {
-					jid = jid,
-					subscription = roster[jid].subscription,
-					ask = roster[jid].ask,
-					name = roster[jid].name,
-				});
-				for group in pairs(roster[jid].groups) do
-					query:tag("group"):text(group):up();
-				end
-				query:up();
+	local user, host, resource = jid.split(fields.accountjid);
+	if host ~= module_host then
+		return { status = "completed", error = { message = "Tried to get roster for a user on " .. host .. " but command was sent to " .. module_host } };
+	elseif not usermanager_user_exists(user, host) then
+		return { status = "completed", error = { message = "User does not exist" } };
+	end
+	local roster = rm_load_roster(user, host);
+
+	local query = st.stanza("query", { xmlns = "jabber:iq:roster" });
+	for jid in pairs(roster) do
+		if jid ~= "pending" and jid then
+			query:tag("item", {
+				jid = jid,
+				subscription = roster[jid].subscription,
+				ask = roster[jid].ask,
+				name = roster[jid].name,
+			});
+			for group in pairs(roster[jid].groups) do
+				query:tag("group"):text(group):up();
 			end
+			query:up();
 		end
-
-		local query_text = tostring(query):gsub("><", ">\n<");
-
-		local result = get_user_roster_result_layout:form({ accountjid = user.."@"..host, roster = query_text }, "result");
-		result:add_child(query);
-		return { status = "completed", other = result };
-	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = get_user_roster_layout }, "executing";
 	end
-end
 
-function get_user_stats_handler(self, data, state)
-	local get_user_stats_layout = dataforms_new{
-		title = "Get User Statistics";
-		instructions = "Fill out this form to gather user statistics.";
+	local query_text = tostring(query):gsub("><", ">\n<");
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "accountjid", type = "jid-single", required = true, label = "The Jabber ID for statistics" };
-	};
+	local result = get_user_roster_result_layout:form({ accountjid = user.."@"..host, roster = query_text }, "result");
+	result:add_child(query);
+	return { status = "completed", other = result };
+end);
 
-	local get_user_stats_result_layout = dataforms_new{
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "ipaddresses", type = "text-multi", label = "IP Addresses" };
-		{ name = "rostersize", type = "text-single", label = "Roster size" };
-		{ name = "onlineresources", type = "text-multi", label = "Online Resources" };
-	};
+-- Getting user statistics
+local get_user_stats_layout = dataforms_new{
+	title = "Get User Statistics";
+	instructions = "Fill out this form to gather user statistics.";
 
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-
-		local fields, err = get_user_stats_layout:data(data.form);
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "accountjid", type = "jid-single", required = true, label = "The Jabber ID for statistics" };
+};
 
-		if err then
-			return generate_error_message(err);
-		end
+local get_user_stats_result_layout = dataforms_new{
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "ipaddresses", type = "text-multi", label = "IP Addresses" };
+	{ name = "rostersize", type = "text-single", label = "Roster size" };
+	{ name = "onlineresources", type = "text-multi", label = "Online Resources" };
+};
 
-		local user, host, resource = jid.split(fields.accountjid);
-		if host ~= data.to then
-			return { status = "completed", error = { message = "Tried to get stats for a user on " .. host .. " but command was sent to " .. data.to } };
-		elseif not usermanager_user_exists(user, host) then
-			return { status = "completed", error = { message = "User does not exist" } };
-		end
-		local roster = rm_load_roster(user, host);
-		local rostersize = 0;
-		local IPs = "";
-		local resources = "";
-		for jid in pairs(roster) do
-			if jid ~= "pending" and jid then
-				rostersize = rostersize + 1;
-			end
-		end
-		for resource, session in pairs((hosts[host].sessions[user] and hosts[host].sessions[user].sessions) or {}) do
-			resources = resources .. "\n" .. resource;
-			IPs = IPs .. "\n" .. session.ip;
-		end
-		return { status = "completed", result = {layout = get_user_stats_result_layout, values = {ipaddresses = IPs, rostersize = tostring(rostersize),
-			onlineresources = resources}} };
-	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = get_user_stats_layout }, "executing";
+local get_user_stats_handler = adhoc_simple(get_user_stats_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
 	end
-end
 
-function get_online_users_command_handler(self, data, state)
-	local get_online_users_layout = dataforms_new{
-		title = "Getting List of Online Users";
-		instructions = "How many users should be returned at most?";
-
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "max_items", type = "list-single", label = "Maximum number of users",
-			value = { "25", "50", "75", "100", "150", "200", "all" } };
-		{ name = "details", type = "boolean", label = "Show details" };
-	};
-
-	local get_online_users_result_layout = dataforms_new{
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "onlineuserjids", type = "text-multi", label = "The list of all online users" };
-	};
-
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-
-		local fields, err = get_online_users_layout:data(data.form);
-
-		if err then
-			return generate_error_message(err);
+	local user, host, resource = jid.split(fields.accountjid);
+	if host ~= module_host then
+		return { status = "completed", error = { message = "Tried to get stats for a user on " .. host .. " but command was sent to " .. module_host } };
+	elseif not usermanager_user_exists(user, host) then
+		return { status = "completed", error = { message = "User does not exist" } };
+	end
+	local roster = rm_load_roster(user, host);
+	local rostersize = 0;
+	local IPs = "";
+	local resources = "";
+	for jid in pairs(roster) do
+		if jid ~= "pending" and jid then
+			rostersize = rostersize + 1;
 		end
+	end
+	for resource, session in pairs((hosts[host].sessions[user] and hosts[host].sessions[user].sessions) or {}) do
+		resources = resources .. "\n" .. resource;
+		IPs = IPs .. "\n" .. session.ip;
+	end
+	return { status = "completed", result = {layout = get_user_stats_result_layout, values = {ipaddresses = IPs, rostersize = tostring(rostersize),
+		onlineresources = resources}} };
+end);
+
+-- Getting a list of online users
+local get_online_users_layout = dataforms_new{
+	title = "Getting List of Online Users";
+	instructions = "How many users should be returned at most?";
+
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "max_items", type = "list-single", label = "Maximum number of users",
+		value = { "25", "50", "75", "100", "150", "200", "all" } };
+	{ name = "details", type = "boolean", label = "Show details" };
+};
+
+local get_online_users_result_layout = dataforms_new{
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "onlineuserjids", type = "text-multi", label = "The list of all online users" };
+};
+
+local get_online_users_command_handler = adhoc_simple(get_online_users_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
+	end
 
-		local max_items = nil
-		if fields.max_items ~= "all" then
-			max_items = tonumber(fields.max_items);
-		end
-		local count = 0;
-		local users = {};
-		for username, user in pairs(hosts[data.to].sessions or {}) do
-			if (max_items ~= nil) and (count >= max_items) then
-				break;
-			end
-			users[#users+1] = username.."@"..data.to;
-			count = count + 1;
-			if fields.details then
-				for resource, session in pairs(user.sessions or {}) do
-					local status, priority = "unavailable", tostring(session.priority or "-");
-					if session.presence then
-						status = session.presence:child_with_name("show");
-						if status then
-							status = status:get_text() or "[invalid!]";
-						else
-							status = "available";
-						end
+	local max_items = nil
+	if fields.max_items ~= "all" then
+		max_items = tonumber(fields.max_items);
+	end
+	local count = 0;
+	local users = {};
+	for username, user in pairs(hosts[module_host].sessions or {}) do
+		if (max_items ~= nil) and (count >= max_items) then
+			break;
+		end
+		users[#users+1] = username.."@"..module_host;
+		count = count + 1;
+		if fields.details then
+			for resource, session in pairs(user.sessions or {}) do
+				local status, priority = "unavailable", tostring(session.priority or "-");
+				if session.presence then
+					status = session.presence:child_with_name("show");
+					if status then
+						status = status:get_text() or "[invalid!]";
+					else
+						status = "available";
 					end
-					users[#users+1] = " - "..resource..": "..status.."("..priority..")";
 				end
+				users[#users+1] = " - "..resource..": "..status.."("..priority..")";
 			end
 		end
-		return { status = "completed", result = {layout = get_online_users_result_layout, values = {onlineuserjids=t_concat(users, "\n")}} };
-	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = get_online_users_layout }, "executing";
 	end
-end
+	return { status = "completed", result = {layout = get_online_users_result_layout, values = {onlineuserjids=t_concat(users, "\n")}} };
+end);
 
-function list_modules_handler(self, data, state)
-	local result = dataforms_new {
-		title = "List of loaded modules";
+-- Getting a list of loaded modules
+local list_modules_result = dataforms_new {
+	title = "List of loaded modules";
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#list" };
-		{ name = "modules", type = "text-multi", label = "The following modules are loaded:" };
-	};
-
-	local modules = array.collect(keys(hosts[data.to].modules)):sort():concat("\n");
+	{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#list" };
+	{ name = "modules", type = "text-multi", label = "The following modules are loaded:" };
+};
 
-	return { status = "completed", result = { layout = result; values = { modules = modules } } };
+local function list_modules_handler(self, data, state)
+	local modules = array.collect(keys(hosts[module_host].modules)):sort():concat("\n");
+	return { status = "completed", result = { layout = list_modules_result; values = { modules = modules } } };
 end
 
-function load_module_handler(self, data, state)
-	local layout = dataforms_new {
-		title = "Load module";
-		instructions = "Specify the module to be loaded";
+-- Loading a module
+local load_module_layout = dataforms_new {
+	title = "Load module";
+	instructions = "Specify the module to be loaded";
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#load" };
-		{ name = "module", type = "text-single", required = true, label = "Module to be loaded:"};
-	};
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-		local fields, err = layout:data(data.form);
-		if err then
-			return generate_error_message(err);
-		end
-		if modulemanager.is_loaded(data.to, fields.module) then
-			return { status = "completed", info = "Module already loaded" };
-		end
-		local ok, err = modulemanager.load(data.to, fields.module);
-		if ok then
-			return { status = "completed", info = 'Module "'..fields.module..'" successfully loaded on host "'..data.to..'".' };
-		else
-			return { status = "completed", error = { message = 'Failed to load module "'..fields.module..'" on host "'..data.to..
-			'". Error was: "'..tostring(err or "<unspecified>")..'"' } };
-		end
+	{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#load" };
+	{ name = "module", type = "text-single", required = true, label = "Module to be loaded:"};
+};
+
+local load_module_handler = adhoc_simple(load_module_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
+	end
+	if modulemanager.is_loaded(module_host, fields.module) then
+		return { status = "completed", info = "Module already loaded" };
+	end
+	local ok, err = modulemanager.load(module_host, fields.module);
+	if ok then
+		return { status = "completed", info = 'Module "'..fields.module..'" successfully loaded on host "'..module_host..'".' };
 	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = layout }, "executing";
+		return { status = "completed", error = { message = 'Failed to load module "'..fields.module..'" on host "'..module_host..
+		'". Error was: "'..tostring(err or "<unspecified>")..'"' } };
 	end
-end
-
-local function globally_load_module_handler(self, data, state)
-	local layout = dataforms_new {
-		title = "Globally load module";
-		instructions = "Specify the module to be loaded on all hosts";
-
-		{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#global-load" };
-		{ name = "module", type = "text-single", required = true, label = "Module to globally load:"};
-	};
-	if state then
-		local ok_list, err_list = {}, {};
+end);
 
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
+-- Globally loading a module
+local globally_load_module_layout = dataforms_new {
+	title = "Globally load module";
+	instructions = "Specify the module to be loaded on all hosts";
 
-		local fields, err = layout:data(data.form);
-		if err then
-			return generate_error_message(err);
-		end
+	{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#global-load" };
+	{ name = "module", type = "text-single", required = true, label = "Module to globally load:"};
+};
 
-		local ok, err = modulemanager.load(data.to, fields.module);
-		if ok then
-			ok_list[#ok_list + 1] = data.to;
-		else
-			err_list[#err_list + 1] = data.to .. " (Error: " .. tostring(err) .. ")";
-		end
+local globally_load_module_handler = adhoc_simple(globally_load_module_layout, function(fields, err)
+	local ok_list, err_list = {}, {};
 
-		-- Is this a global module?
-		if modulemanager.is_loaded("*", fields.module) and not modulemanager.is_loaded(data.to, fields.module) then
-			return { status = "completed", info = 'Global module '..fields.module..' loaded.' };
-		end
-
-		-- This is either a shared or "normal" module, load it on all other hosts
-		for host_name, host in pairs(hosts) do
-			if host_name ~= data.to and host.type == "local" then
-				local ok, err = modulemanager.load(host_name, fields.module);
-				if ok then
-					ok_list[#ok_list + 1] = host_name;
-				else
-					err_list[#err_list + 1] = host_name .. " (Error: " .. tostring(err) .. ")";
-				end
-			end
-		end
+	if err then
+		return generate_error_message(err);
+	end
 
-		local info = (#ok_list > 0 and ("The module "..fields.module.." was successfully loaded onto the hosts:\n"..t_concat(ok_list, "\n")) or "")
-			.. ((#ok_list > 0 and #err_list > 0) and "\n" or "") ..
-			(#err_list > 0 and ("Failed to load the module "..fields.module.." onto the hosts:\n"..t_concat(err_list, "\n")) or "");
-		return { status = "completed", info = info };
+	local ok, err = modulemanager.load(module_host, fields.module);
+	if ok then
+		ok_list[#ok_list + 1] = module_host;
 	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = layout }, "executing";
+		err_list[#err_list + 1] = module_host .. " (Error: " .. tostring(err) .. ")";
 	end
-end
 
-function reload_modules_handler(self, data, state)
-	local layout = dataforms_new {
-		title = "Reload modules";
-		instructions = "Select the modules to be reloaded";
+	-- Is this a global module?
+	if modulemanager.is_loaded("*", fields.module) and not modulemanager.is_loaded(module_host, fields.module) then
+		return { status = "completed", info = 'Global module '..fields.module..' loaded.' };
+	end
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#reload" };
-		{ name = "modules", type = "list-multi", required = true, label = "Modules to be reloaded:"};
-	};
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-		local fields, err = layout:data(data.form);
-		if err then
-			return generate_error_message(err);
-		end
-		local ok_list, err_list = {}, {};
-		for _, module in ipairs(fields.modules) do
-			local ok, err = modulemanager.reload(data.to, module);
+	-- This is either a shared or "normal" module, load it on all other hosts
+	for host_name, host in pairs(hosts) do
+		if host_name ~= module_host and host.type == "local" then
+			local ok, err = modulemanager.load(host_name, fields.module);
 			if ok then
-				ok_list[#ok_list + 1] = module;
+				ok_list[#ok_list + 1] = host_name;
 			else
-				err_list[#err_list + 1] = module .. "(Error: " .. tostring(err) .. ")";
+				err_list[#err_list + 1] = host_name .. " (Error: " .. tostring(err) .. ")";
 			end
 		end
-		local info = (#ok_list > 0 and ("The following modules were successfully reloaded on host "..data.to..":\n"..t_concat(ok_list, "\n")) or "")
-			.. ((#ok_list > 0 and #err_list > 0) and "\n" or "") ..
-			(#err_list > 0 and ("Failed to reload the following modules on host "..data.to..":\n"..t_concat(err_list, "\n")) or "");
-		return { status = "completed", info = info };
-	else
-		local modules = array.collect(keys(hosts[data.to].modules)):sort();
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = { layout = layout; values = { modules = modules } } }, "executing";
 	end
-end
 
-local function globally_reload_module_handler(self, data, state)
-	local layout = dataforms_new {
-		title = "Globally reload module";
-		instructions = "Specify the module to reload on all hosts";
-
-		{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#global-reload" };
-		{ name = "module", type = "list-single", required = true, label = "Module to globally reload:"};
-	};
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-
-		local is_global = false;
-		local fields, err = layout:data(data.form);
-		if err then
-			return generate_error_message(err);
+	local info = (#ok_list > 0 and ("The module "..fields.module.." was successfully loaded onto the hosts:\n"..t_concat(ok_list, "\n")) or "")
+		.. ((#ok_list > 0 and #err_list > 0) and "\n" or "") ..
+		(#err_list > 0 and ("Failed to load the module "..fields.module.." onto the hosts:\n"..t_concat(err_list, "\n")) or "");
+	return { status = "completed", info = info };
+end);
+
+-- Reloading modules
+local reload_modules_layout = dataforms_new {
+	title = "Reload modules";
+	instructions = "Select the modules to be reloaded";
+
+	{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#reload" };
+	{ name = "modules", type = "list-multi", required = true, label = "Modules to be reloaded:"};
+};
+
+local reload_modules_handler = adhoc_initial(reload_modules_layout, function()
+	return { modules = array.collect(keys(hosts[module_host].modules)):sort() };
+end, function(fields, err)
+	if err then
+		return generate_error_message(err);
+	end
+	local ok_list, err_list = {}, {};
+	for _, module in ipairs(fields.modules) do
+		local ok, err = modulemanager.reload(module_host, module);
+		if ok then
+			ok_list[#ok_list + 1] = module;
+		else
+			err_list[#err_list + 1] = module .. "(Error: " .. tostring(err) .. ")";
 		end
+	end
+	local info = (#ok_list > 0 and ("The following modules were successfully reloaded on host "..module_host..":\n"..t_concat(ok_list, "\n")) or "")
+		.. ((#ok_list > 0 and #err_list > 0) and "\n" or "") ..
+		(#err_list > 0 and ("Failed to reload the following modules on host "..module_host..":\n"..t_concat(err_list, "\n")) or "");
+	return { status = "completed", info = info };
+end);
+
+-- Globally reloading a module
+local globally_reload_module_layout = dataforms_new {
+	title = "Globally reload module";
+	instructions = "Specify the module to reload on all hosts";
+
+	{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#global-reload" };
+	{ name = "module", type = "list-single", required = true, label = "Module to globally reload:"};
+};
+
+local globally_reload_module_handler = adhoc_initial(globally_reload_module_layout, function()
+	local loaded_modules = array(keys(modulemanager.get_modules("*")));
+	for _, host in pairs(hosts) do
+		loaded_modules:append(array(keys(host.modules)));
+	end
+	loaded_modules = array(keys(set.new(loaded_modules):items())):sort();
+	return { module = loaded_modules };
+end, function(fields, err)
+	local is_global = false;
 
-		if modulemanager.is_loaded("*", fields.module) then
-			local ok, err = modulemanager.reload("*", fields.module);
-			if not ok then
-				return { status = "completed", info = 'Global module '..fields.module..' failed to reload: '..err };
-			end
-			is_global = true;
-		end
+	if err then
+		return generate_error_message(err);
+	end
 
-		local ok_list, err_list = {}, {};
-		for host_name, host in pairs(hosts) do
-			if modulemanager.is_loaded(host_name, fields.module)  then
-				local ok, err = modulemanager.reload(host_name, fields.module);
-				if ok then
-					ok_list[#ok_list + 1] = host_name;
-				else
-					err_list[#err_list + 1] = host_name .. " (Error: " .. tostring(err) .. ")";
-				end
-			end
+	if modulemanager.is_loaded("*", fields.module) then
+		local ok, err = modulemanager.reload("*", fields.module);
+		if not ok then
+			return { status = "completed", info = 'Global module '..fields.module..' failed to reload: '..err };
 		end
+		is_global = true;
+	end
 
-		if #ok_list == 0 and #err_list == 0 then
-			if is_global then
-				return { status = "completed", info = 'Successfully reloaded global module '..fields.module };
+	local ok_list, err_list = {}, {};
+	for host_name, host in pairs(hosts) do
+		if modulemanager.is_loaded(host_name, fields.module)  then
+			local ok, err = modulemanager.reload(host_name, fields.module);
+			if ok then
+				ok_list[#ok_list + 1] = host_name;
 			else
-				return { status = "completed", info = 'Module '..fields.module..' not loaded on any host.' };
+				err_list[#err_list + 1] = host_name .. " (Error: " .. tostring(err) .. ")";
 			end
 		end
+	end
 
-		local info = (#ok_list > 0 and ("The module "..fields.module.." was successfully reloaded on the hosts:\n"..t_concat(ok_list, "\n")) or "")
-			.. ((#ok_list > 0 and #err_list > 0) and "\n" or "") ..
-			(#err_list > 0 and ("Failed to reload the module "..fields.module.." on the hosts:\n"..t_concat(err_list, "\n")) or "");
-		return { status = "completed", info = info };
-	else
-		local loaded_modules = array(keys(modulemanager.get_modules("*")));
-		for _, host in pairs(hosts) do
-			loaded_modules:append(array(keys(host.modules)));
+	if #ok_list == 0 and #err_list == 0 then
+		if is_global then
+			return { status = "completed", info = 'Successfully reloaded global module '..fields.module };
+		else
+			return { status = "completed", info = 'Module '..fields.module..' not loaded on any host.' };
 		end
-		loaded_modules = array(keys(set.new(loaded_modules):items())):sort();
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = { layout = layout, values = { module = loaded_modules } } }, "executing";
 	end
-end
 
-function send_to_online(message, server)
+	local info = (#ok_list > 0 and ("The module "..fields.module.." was successfully reloaded on the hosts:\n"..t_concat(ok_list, "\n")) or "")
+		.. ((#ok_list > 0 and #err_list > 0) and "\n" or "") ..
+		(#err_list > 0 and ("Failed to reload the module "..fields.module.." on the hosts:\n"..t_concat(err_list, "\n")) or "");
+	return { status = "completed", info = info };
+end);
+
+local function send_to_online(message, server)
 	if server then
 		sessions = { [server] = hosts[server] };
 	else
@@ -633,202 +552,170 @@ function send_to_online(message, server)
 	return c;
 end
 
-function shut_down_service_handler(self, data, state)
-	local shut_down_service_layout = dataforms_new{
-		title = "Shutting Down the Service";
-		instructions = "Fill out this form to shut down the service.";
-
-		{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
-		{ name = "delay", type = "list-single", label = "Time delay before shutting down",
-			value = { {label = "30 seconds", value = "30"},
-				  {label = "60 seconds", value = "60"},
-				  {label = "90 seconds", value = "90"},
-				  {label = "2 minutes", value = "120"},
-				  {label = "3 minutes", value = "180"},
-				  {label = "4 minutes", value = "240"},
-				  {label = "5 minutes", value = "300"},
-			};
+-- Shutting down the service
+local shut_down_service_layout = dataforms_new{
+	title = "Shutting Down the Service";
+	instructions = "Fill out this form to shut down the service.";
+
+	{ name = "FORM_TYPE", type = "hidden", value = "http://jabber.org/protocol/admin" };
+	{ name = "delay", type = "list-single", label = "Time delay before shutting down",
+		value = { {label = "30 seconds", value = "30"},
+			  {label = "60 seconds", value = "60"},
+			  {label = "90 seconds", value = "90"},
+			  {label = "2 minutes", value = "120"},
+			  {label = "3 minutes", value = "180"},
+			  {label = "4 minutes", value = "240"},
+			  {label = "5 minutes", value = "300"},
 		};
-		{ name = "announcement", type = "text-multi", label = "Announcement" };
 	};
+	{ name = "announcement", type = "text-multi", label = "Announcement" };
+};
 
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
+local shut_down_service_handler = adhoc_simple(shut_down_service_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
+	end
 
-		local fields, err = shut_down_service_layout:data(data.form);
+	if fields.announcement and #fields.announcement > 0 then
+		local message = st.message({type = "headline"}, fields.announcement):up()
+			:tag("subject"):text("Server is shutting down");
+		send_to_online(message);
+	end
 
-		if err then
-			return generate_error_message(err);
-		end
+	timer_add_task(tonumber(fields.delay or "5"), function(time) prosody.shutdown("Shutdown by adhoc command") end);
 
-		if fields.announcement and #fields.announcement > 0 then
-			local message = st.message({type = "headline"}, fields.announcement):up()
-				:tag("subject"):text("Server is shutting down");
-			send_to_online(message);
-		end
+	return { status = "completed", info = "Server is about to shut down" };
+end);
 
-		timer_add_task(tonumber(fields.delay or "5"), function(time) prosody.shutdown("Shutdown by adhoc command") end);
+-- Unloading modules
+local unload_modules_layout = dataforms_new {
+	title = "Unload modules";
+	instructions = "Select the modules to be unloaded";
 
-		return { status = "completed", info = "Server is about to shut down" };
-	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = shut_down_service_layout }, "executing";
-	end
-end
-
-function unload_modules_handler(self, data, state)
-	local layout = dataforms_new {
-		title = "Unload modules";
-		instructions = "Select the modules to be unloaded";
+	{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#unload" };
+	{ name = "modules", type = "list-multi", required = true, label = "Modules to be unloaded:"};
+};
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#unload" };
-		{ name = "modules", type = "list-multi", required = true, label = "Modules to be unloaded:"};
-	};
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
+local unload_modules_handler = adhoc_initial(unload_modules_layout, function()
+	return { modules = array.collect(keys(hosts[module_host].modules)):sort() };
+end, function(fields, err)
+	if err then
+		return generate_error_message(err);
+	end
+	local ok_list, err_list = {}, {};
+	for _, module in ipairs(fields.modules) do
+		local ok, err = modulemanager.unload(module_host, module);
+		if ok then
+			ok_list[#ok_list + 1] = module;
+		else
+			err_list[#err_list + 1] = module .. "(Error: " .. tostring(err) .. ")";
 		end
-		local fields, err = layout:data(data.form);
-		if err then
-			return generate_error_message(err);
+	end
+	local info = (#ok_list > 0 and ("The following modules were successfully unloaded on host "..module_host..":\n"..t_concat(ok_list, "\n")) or "")
+		.. ((#ok_list > 0 and #err_list > 0) and "\n" or "") ..
+		(#err_list > 0 and ("Failed to unload the following modules on host "..module_host..":\n"..t_concat(err_list, "\n")) or "");
+	return { status = "completed", info = info };
+end);
+
+-- Globally unloading a module
+local globally_unload_module_layout = dataforms_new {
+	title = "Globally unload module";
+	instructions = "Specify a module to unload on all hosts";
+
+	{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#global-unload" };
+	{ name = "module", type = "list-single", required = true, label = "Module to globally unload:"};
+};
+
+local globally_unload_module_handler = adhoc_initial(globally_unload_module_layout, function()
+	local loaded_modules = array(keys(modulemanager.get_modules("*")));
+	for _, host in pairs(hosts) do
+		loaded_modules:append(array(keys(host.modules)));
+	end
+	loaded_modules = array(keys(set.new(loaded_modules):items())):sort();
+	return { module = loaded_modules };
+end, function(fields, err)
+	local is_global = false;
+	if err then
+		return generate_error_message(err);
+	end
+
+	if modulemanager.is_loaded("*", fields.module) then
+		local ok, err = modulemanager.unload("*", fields.module);
+		if not ok then
+			return { status = "completed", info = 'Global module '..fields.module..' failed to unload: '..err };
 		end
-		local ok_list, err_list = {}, {};
-		for _, module in ipairs(fields.modules) do
-			local ok, err = modulemanager.unload(data.to, module);
+		is_global = true;
+	end
+
+	local ok_list, err_list = {}, {};
+	for host_name, host in pairs(hosts) do
+		if modulemanager.is_loaded(host_name, fields.module)  then
+			local ok, err = modulemanager.unload(host_name, fields.module);
 			if ok then
-				ok_list[#ok_list + 1] = module;
+				ok_list[#ok_list + 1] = host_name;
 			else
-				err_list[#err_list + 1] = module .. "(Error: " .. tostring(err) .. ")";
+				err_list[#err_list + 1] = host_name .. " (Error: " .. tostring(err) .. ")";
 			end
 		end
-		local info = (#ok_list > 0 and ("The following modules were successfully unloaded on host "..data.to..":\n"..t_concat(ok_list, "\n")) or "")
-			.. ((#ok_list > 0 and #err_list > 0) and "\n" or "") ..
-			(#err_list > 0 and ("Failed to unload the following modules on host "..data.to..":\n"..t_concat(err_list, "\n")) or "");
-		return { status = "completed", info = info };
-	else
-		local modules = array.collect(keys(hosts[data.to].modules)):sort();
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = { layout = layout; values = { modules = modules } } }, "executing";
 	end
-end
-
-local function globally_unload_module_handler(self, data, state)
-	local layout = dataforms_new {
-		title = "Globally unload module";
-		instructions = "Specify a module to unload on all hosts";
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/modules#global-unload" };
-		{ name = "module", type = "list-single", required = true, label = "Module to globally unload:"};
-	};
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
+	if #ok_list == 0 and #err_list == 0 then
+		if is_global then
+			return { status = "completed", info = 'Successfully unloaded global module '..fields.module };
+		else
+			return { status = "completed", info = 'Module '..fields.module..' not loaded on any host.' };
 		end
+	end
 
-		local is_global = false;
-		local fields, err = layout:data(data.form);
-		if err then
-			return generate_error_message(err);
-		end
+	local info = (#ok_list > 0 and ("The module "..fields.module.." was successfully unloaded on the hosts:\n"..t_concat(ok_list, "\n")) or "")
+		.. ((#ok_list > 0 and #err_list > 0) and "\n" or "") ..
+		(#err_list > 0 and ("Failed to unload the module "..fields.module.." on the hosts:\n"..t_concat(err_list, "\n")) or "");
+	return { status = "completed", info = info };
+end);
 
-		if modulemanager.is_loaded("*", fields.module) then
-			local ok, err = modulemanager.unload("*", fields.module);
-			if not ok then
-				return { status = "completed", info = 'Global module '..fields.module..' failed to unload: '..err };
-			end
-			is_global = true;
-		end
+-- Activating a host
+local activate_host_layout = dataforms_new {
+	title = "Activate host";
+	instructions = "";
 
-		local ok_list, err_list = {}, {};
-		for host_name, host in pairs(hosts) do
-			if modulemanager.is_loaded(host_name, fields.module)  then
-				local ok, err = modulemanager.unload(host_name, fields.module);
-				if ok then
-					ok_list[#ok_list + 1] = host_name;
-				else
-					err_list[#err_list + 1] = host_name .. " (Error: " .. tostring(err) .. ")";
-				end
-			end
-		end
+	{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/hosts#activate" };
+	{ name = "host", type = "text-single", required = true, label = "Host:"};
+};
 
-		if #ok_list == 0 and #err_list == 0 then
-			if is_global then
-				return { status = "completed", info = 'Successfully unloaded global module '..fields.module };
-			else
-				return { status = "completed", info = 'Module '..fields.module..' not loaded on any host.' };
-			end
-		end
+local activate_host_handler = adhoc_simple(activate_host_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
+	end
+	local ok, err = hostmanager_activate(fields.host);
 
-		local info = (#ok_list > 0 and ("The module "..fields.module.." was successfully unloaded on the hosts:\n"..t_concat(ok_list, "\n")) or "")
-			.. ((#ok_list > 0 and #err_list > 0) and "\n" or "") ..
-			(#err_list > 0 and ("Failed to unload the module "..fields.module.." on the hosts:\n"..t_concat(err_list, "\n")) or "");
-		return { status = "completed", info = info };
+	if ok then
+		return { status = "completed", info = fields.host .. " activated" };
 	else
-		local loaded_modules = array(keys(modulemanager.get_modules("*")));
-		for _, host in pairs(hosts) do
-			loaded_modules:append(array(keys(host.modules)));
-		end
-		loaded_modules = array(keys(set.new(loaded_modules):items())):sort();
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = { layout = layout, values = { module = loaded_modules } } }, "executing";
+		return { status = "canceled", error = err }
 	end
-end
+end);
 
+-- Deactivating a host
+local deactivate_host_layout = dataforms_new {
+	title = "Deactivate host";
+	instructions = "";
 
-function activate_host_handler(self, data, state)
-	local layout = dataforms_new {
-		title = "Activate host";
-		instructions = "";
+	{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/hosts#activate" };
+	{ name = "host", type = "text-single", required = true, label = "Host:"};
+};
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/hosts#activate" };
-		{ name = "host", type = "text-single", required = true, label = "Host:"};
-	};
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-		local fields, err = layout:data(data.form);
-		if err then
-			return generate_error_message(err);
-		end
-		local ok, err = hostmanager_activate(fields.host);
-
-		if ok then
-			return { status = "completed", info = fields.host .. " activated" };
-		else
-			return { status = "canceled", error = err }
-		end
-	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = { layout = layout } }, "executing";
+local deactivate_host_handler = adhoc_simple(deactivate_host_layout, function(fields, err)
+	if err then
+		return generate_error_message(err);
 	end
-end
-
-function deactivate_host_handler(self, data, state)
-	local layout = dataforms_new {
-		title = "Deactivate host";
-		instructions = "";
+	local ok, err = hostmanager_deactivate(fields.host);
 
-		{ name = "FORM_TYPE", type = "hidden", value = "http://prosody.im/protocol/hosts#activate" };
-		{ name = "host", type = "text-single", required = true, label = "Host:"};
-	};
-	if state then
-		if data.action == "cancel" then
-			return { status = "canceled" };
-		end
-		local fields, err = layout:data(data.form);
-		if err then
-			return generate_error_message(err);
-		end
-		local ok, err = hostmanager_deactivate(fields.host);
-
-		if ok then
-			return { status = "completed", info = fields.host .. " deactivated" };
-		else
-			return { status = "canceled", error = err }
-		end
+	if ok then
+		return { status = "completed", info = fields.host .. " deactivated" };
 	else
-		return { status = "executing", actions = {"next", "complete", default = "complete"}, form = { layout = layout } }, "executing";
+		return { status = "canceled", error = err }
 	end
-end
+end);
 
 
 local add_user_desc = adhoc_new("Add User", "http://jabber.org/protocol/admin#add-user", add_user_command_handler, "admin");
diff --git a/util/adhoc.lua b/util/adhoc.lua
new file mode 100644
index 00000000..671e85cf
--- /dev/null
+++ b/util/adhoc.lua
@@ -0,0 +1,31 @@
+local function new_simple_form(form, result_handler)
+	return function(self, data, state)
+		if state then
+			if data.action == "cancel" then
+				return { status = "canceled" };
+			end
+			local fields, err = form:data(data.form);
+			return result_handler(fields, err, data);
+		else
+			return { status = "executing", actions = {"next", "complete", default = "complete"}, form = form }, "executing";
+		end
+	end
+end
+
+local function new_initial_data_form(form, initial_data, result_handler)
+	return function(self, data, state)
+		if state then
+			if data.action == "cancel" then
+				return { status = "canceled" };
+			end
+			local fields, err = form:data(data.form);
+			return result_handler(fields, err, data);
+		else
+			return { status = "executing", actions = {"next", "complete", default = "complete"},
+				 form = { layout = form, values = initial_data() } }, "executing";
+		end
+	end
+end
+
+return { new_simple_form = new_simple_form,
+	 new_initial_data_form = new_initial_data_form };